You wanted her to leave. Now that she's gone you are freaking out.
He wanted her to leave on his terms, not her own.
The satisfaction of making someone else leave on your terms is a boost to one's self esteem and self-respect.
And then there are feelings...sometimes when a person is gone, you don't realize how much you miss them, even though you don't really like them....
The highs and lows of the relationship---a cycle, an ouroboros---a self perpetuating cycle.